When using the basic cannons that shoot an arced cannon shot and explode on impact, after you are victorious in a battle the damage you dealt the the enemy pirates ship converts to your ship. I was battling a difficulty 4 pirate ship and after unleashing about 8 cannons on their ship, I boarded, cleared it out and then returned to my ship, my crewmen frantically were repairing my ship which was at 94% integrity when it was previously 100%. I assume this occurs because once an enemy ship is cleared of all hostiles you basically are the owner of both ships, so any damage you did to the enemy ship also goes to you, like both ships are one kinda thing. I would like this to be fixed because I am just wrecking myself. Also I did do this against ships with NO cannons and they never boarded me, so I see no reason for percentage to drop.